diff --git a/inform7/Internal/Inter/CommandParserKit/Sections/Parser.i6t b/inform7/Internal/Inter/CommandParserKit/Sections/Parser.i6t
index d795780e3..510cc9a9b 100644
--- a/inform7/Internal/Inter/CommandParserKit/Sections/Parser.i6t
+++ b/inform7/Internal/Inter/CommandParserKit/Sections/Parser.i6t
@@ -1282,6 +1282,9 @@ communicates a snippet of words to another character, just as if the
 player had typed ANSWER ARFLE BARFLE GLOOP TO PERSON. For I7 purposes, the
 fake action |##NotUnderstood| does not exist.
 
+In order to assist people who do want to parse that type of mistyped command
+in extensions, wn is left pointing at the first misunderstood word.
+
 =
   .GiveError;
 
@@ -1291,6 +1294,7 @@ fake action |##NotUnderstood| does not exist.
             verb_wordnum = usual_grammar_after;
             jump AlmostReParse;
         }
+				m = wn; ! Save wn so extension authors can parse command errors if they want to
         wn = 1;
         while ((wn <= num_words) && (NextWord() ~= comma_word)) ;
         parser_results-->ACTION_PRES = ##Answer;
@@ -1299,6 +1303,7 @@ fake action |##NotUnderstood| does not exist.
         parser_results-->INP2_PRES = 1; special_number1 = special_word;
         actor = player;
         consult_from = wn; consult_words = num_words-consult_from+1;
+				wn = m; ! Restore wn so extension authors can parse command errors if they want to
         rtrue;
     }